tile PCI RC: support more MSI-X interrupt vectors
To support PCIe devices with higher number of MSI-X interrupt vectors,
e.g. 16 for the LSI RAID card, enhance the Gx RC stack to provide more
MSI-X vectors by using the TRIO Scatter Queues, which provide 8 more
vectors in addition to ~10 from the Map Mem regions.
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
diff --git a/arch/tile/gxio/iorpc_trio.c b/arch/tile/gxio/iorpc_trio.c
index cef4b22..da6e18e 100644
--- a/arch/tile/gxio/iorpc_trio.c
+++ b/arch/tile/gxio/iorpc_trio.c
@@ -61,6 +61,29 @@
EXPORT_SYMBOL(gxio_trio_alloc_memory_maps);
+struct alloc_scatter_queues_param {
+ unsigned int count;
+ unsigned int first;
+ unsigned int flags;
+};
+
+int gxio_trio_alloc_scatter_queues(gxio_trio_context_t * context,
+ unsigned int count, unsigned int first,
+ unsigned int flags)
+{
+ struct alloc_scatter_queues_param temp;
+ struct alloc_scatter_queues_param *params = &temp;
+
+ params->count = count;
+ params->first = first;
+ params->flags = flags;
+
+ return hv_dev_pwrite(context->fd, 0, (HV_VirtAddr) params,
+ sizeof(*params),
+ GXIO_TRIO_OP_ALLOC_SCATTER_QUEUES);
+}
+
+EXPORT_SYMBOL(gxio_trio_alloc_scatter_queues);
struct alloc_pio_regions_param {
unsigned int count;